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Finding the Fourth Proportional to 2,947.83, 4,068 and 1,621.56

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Solution

The fourth proportional to 2,947.83, 4,068 and 1,621.56 is: 2,237.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,947.83 : 4,068 = 1,621.56 : x
  2. Step 2: Convert to fraction form
    2,947.83/4,068 = 1,621.56/x
  3. Step 3: Cross multiply
    2,947.83x = 4,068 × 1,621.56
  4. Step 4: Simplify right side
    2,947.83x = 6,596,506.08
  5. Step 5: Solve for x
    x = 6,596,506.08/2,947.83
  6. Step 6: Final answer
    x = 2,237.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.